Sharpening device



FIG. 1 is a front view of a sharpening device showing my new design;

FIG. 2 is a right view, thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a top view thereof; and,

FIG. 7 is a perspective view of the sharpening device shown in FIG. 1.

The ornamental design for a sharpening device, as shown and described.